[c-nsp] ip sla monitor/traceroute source

[Arda Balkanay]

For both track destinations you gave the same
ip addresses so the router has one active route
(here the default route) for that destination.
To overcome this situation you can write a route-map
which indicates that for packets with source  interface eth0/0
and destination 204.107.90.128 have a next-hop `192.168.75.1 and
write another route-map for packets with source  interface eth1/0
and destination 204.107.90.128 have a next-hop `192.168.0.1.
Finally you can apply these route-maps in the form of `ip local policy
route-map`  at related ethernet interfaces.

HTH
Arda

On 7/14/07, Tuc at T-B-O-H.NET <ml at t-b-o-h.net> wrote:
>
> Hi,
>
>         I'm having a weird issue. On my router I have :
>
> ip sla monitor 100
> type echo protocol ipIcmpEcho 204.107.90.128 source-interface Ethernet0/0
> timeout 4000
> frequency 10
> ip sla monitor schedule 100 life forever start-time now
> ip sla monitor 200
> type echo protocol ipIcmpEcho 204.107.90.128 source-interface Ethernet1/0
> timeout 4000
> frequency 10
> ip sla monitor schedule 200 life forever start-time now
> !
> !
> track 100 rtr 100 reachability
> delay down 10 up 20
> !
> track 200 rtr 200 reachability
> delay down 10 up 20
>
> ip route 0.0.0.0 0.0.0.0 192.168.75.1 10 name SEABREEZE track 100
> ip route 0.0.0.0 0.0.0.0 192.168.0.1 11 name HUGHES track 200
> ip route 0.0.0.0 0.0.0.0 192.168.0.1 251 name HUGHES_FB
> ip route 0.0.0.0 0.0.0.0 192.168.75.1 252 name SEABREEZE_FB
> !
>
>
>
>         What I notice is that they are either BOTH up, or BOTH down at the
> same time.  Then I noticed the ping times were almost exactly the same!
>
> C3640-1#sho ip sla mon st
> Round trip time (RTT)   Index 100
>         Latest RTT: 696 ms
> Latest operation start time: 08:53:20.321 EDT Sat Jul 14 2007
> Latest operation return code: OK
> Number of successes: 35
> Number of failures: 35
> Operation time to live: Forever
>
> Round trip time (RTT)   Index 200
>         Latest RTT: 727 ms
> Latest operation start time: 08:53:21.389 EDT Sat Jul 14 2007
> Latest operation return code: OK
> Number of successes: 35
> Number of failures: 35
> Operation time to live: Forever
>
>         It should only be this high going over satellite, not wireless.
> So I tried a traceroute using "traceroute 204.107.90.128 source e0/0"
> and "traceroute 204.107.90.128 source e1/0". I noticed that they both
> appeared to take what appeared to be the default route.
>
>         Did I follow the directions at
> http://www.nil.si/ipcorner/SmallSiteMultiHoming/
> wrong? Is there something else I need to do to make it go out the
> proper interface?
>
>                         Thanks, Tuc
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